Antioxidizing paraffin composition



uicnied July 27, 1943 Herbert G. Wore.

coosrrron .iachson metallic, N. Y, assimor to ell-icon Seal-Mapilorpomtion oi Dela were, Wiiminyton, list, a corporation oi Dei- NoDrawing. Application March to, litdii,

Serial No. litdd'rtt i illlaimu. (i311. Mid-Wit) This invention relatesto anti-oxidants for parwesres and oils and has tor an object to preventparafin compositions from oxidizing, dis= coloring or developing anobjectionable odor.

another object is to provide an anti-oxidant or the above type havinsnovel and improved characteristics.

Another object is to provide an anti-oxidant oi the type above indicatedwhich is efiective in en tn mely small percentages.

in'iother object is to provide an anti-oxidant which is suited tocommercial use in connection with was baths used, for example, for papertreatment or the like.

Various other objects and advantages will be apparent as the nature oithe invention is more iulw disclosed.

Although the novel feature which are believed to be characteristic oithis invention are pointed out more particularly in the claims appendedhereto, the nature oi the invention will be better understood byreferring to the following description in which certain specificembodiments thereof have been set forth for purposes of illustration.

in the following description and in the claims certain specific termshave been used for convenience in referring to various detail or theinvention. These terms, however, are to be given as broad aninterpretation as the state oi the art will permit.

it has been found that-baths oi paramn was such, for example, as thoseused commercially for water-proofing, sizing or impregnating paper, tendto foul and to cause discoloration or undesirable odors due to oxidationor the parafdn, particularly after long continued use at elevatedtemperatures. I have discovered that certain other substances, even whenpresent in minute quantitles in a bath or paraiiin waxes or parafinoils,

have the property or preventing such oxidation and permit the bath to beused commercially for long periods or time without fouling. 1

The invention is particularly applicable to parait'ui wax baths to beused for impregnating or percent of crude mcntan wax is suited toprevent oxidation or a paraflin wax bath when the bath is operated atthe above temperature. In fact, this percentage has been foundsatisfactory for a bath maintained in an atmosphere oi oxygen at atemperature as high as 2% F. during a seven hour test period. Thepercentage required for a bath that is used at a lower temperature iseven less. For example, about .02 percent is sufdcient ii the bath ismaintained at a temperature of from 16il F". to 210 F. It is to beunderstood that the percentace oi anti-oindant required increases inaccordance with the temperature oi the bath and at the highertemperatures the increase is much more rapid.

in addition to the above named anti-oxidant, it has been found thatabout .6 percent of ceresin breaks down the crystalline structure of theparafidn and tends to maize the were harder and more water resistant. Abath of parafdn was of the type melting between 133 F. and 138 Ft,containing about .i'i percent ceresin and about .04 percent crude montanwar: is particularly suited to the paper treating process set forth inthe Baum patent above mentioned. This composition possesses thenecessary hardness and waterresistance to prevent the skirt of the capfrom softening or opening up on the bottle due to absorbed water. Thebath will not oxidize, foul or develop objectionable odors even afterlong continued use at elevated temperatures. Furthermore, in the smallpercentage used the crude montan was does not introduce anyobjectionable discoloration.

While crude montan has been found particu larly satisfactory for theabove purpose because of the extremely small quantities which may beused, various other waxes and bituminous materials have also been foundto possess anti-oridant properties in varying degrees, as set forth inthe following table:

Approximate er Approximate per cent reguire dto cent required to preven0x1 2- revent oxidaantl-oxidant materiel tion in an indust iQu in anindustrial parefdn trial parafiin bath at 230 F. bath at 160 F.- 240" F.210 )3.

Crude moutou wax." 04 .02 Ozokeritc (crude) 1 .05 California asphalt. 21 (lamaubawax. .6 .3 Candelilla wax 6 2 Esparto wax 8 4 It is to beunderstood that the above examples are representative only and thatvarious other waxes and bituminous materials such as tars, pitches andthe like having similar properties may be used.

It is also to be understood that the wax baths above mentioned aresuitable for various uses in the paper and allied industries, such astreating, sizing, waterproofing, impregnating, etc., and that theinvention is not to be restricted to the particular use above set iorth.Various changes and modifications may be made therein as will be readilyapparent to a person skilled in the art. The invention is only to belimited in accordance with the scope of the following claims.

What is claimed is:

1. A wax composition for the treatment oi paper comprising a parafllnwax having incorporated therein about .02 to .04 percent of montan wax.

2. A wax composition for the treatment or paper comprising a paraflinwax having incorporated therein about .02 to .04 percent 01 montan waxand about .6 percent ceresin.

3. The method of preventing oxidation 0! molten paraflin wax baths andhot paraflin oil baths which comprises maintaining in the bath about.02% to .04% or montan wax while operating the bath at elevatedtemperatures of not over about 2942 F. and under conditions such thatoxidation would otherwise take place.

4. The method of preventing oxidation 01 molten paraflin wax baths andhot paraflin oil baths which comprises maintaining in the bath about .02percent to about .8 percent of a substance selected from the groupconsisting of montan wax, carnauba wax, candeliila wax, esparto wax andozokerite.

HERBERT G. VORE.

